Continuous optimization
Between your orchestrator and your models. Running locally in the EU.
PII redaction
Stripped before audio reaches your models or logs.
TTS Smart caching
Repeated TTS responses served from cache. Provider never gets called.
LLM routing
Simple turns stay local. Complex turns hit your LLM. Fewer model calls per conversation.
Transcripts
Region, provider, model, cost, latency. Logged per step, per call.
Analytics
Cost and latency tracked against baseline. Dashboard shows the delta.
One header
Add X-Region to any API call. No change to your orchestrator, your models, your agent logic.
1curl -X POST https://api.slng.ai/v1/llm \
2 -H "Authorization: Bearer $SLNG_API_KEY" \
3 -H "X-Region: eu-west-1" \
4 -d '{
5 "model": "gpt-4o",
6 "messages": [{"role": "user", "content": "..."}]
7 }'Locally compliant compute in the European Union
US$ 0.0033 / agent minute
Deepgram Nova 3
Optimized for live applications, delivering low-latency transcription that enables responsive voice agents, captions, and interactive systems.
Soniox STT AI
A universal speech AI that lets you transcribe and translate speech in 60+ languages — from recorded files (async) or live audio streams (real-time).
Speechmatics Batch
Voice models designed for complete transcripts from recorded audio files (batch transcription).
Reson8 Resonant 1
Adapts to domain-specific vocabulary in real time using text-only context, no fine-tuning or audio data required. Purpose-built for European languages with models optimized for streaming and voice agents.
Rime Arcana 3
Provides industry leading latency, enabling natural back-and-forth interactions without awkward pauses.
Cartesia Sonic 3
Takes text input and streams back ultra-realistic speech in response. Can also clone voices, with full control over pronunciation and accent.
Murf AI Falcon
Optimized for real-time use cases where responsiveness is critical. Ensures conversations feel seamless, natural, and instant.
Soniox TTS RT
Engineered to handle the edge cases that break most production speech systems. Delivers high-fidelity speech across 60+ languages with hallucination-free guarantee.
Deepgram Aura 2
Real-time text-to-speech model built for conversational AI. It generates natural, human-like speech with low latency. Low latency, multiple voice options. Streaming.
Kugel 2
Natural-sounding voices optimized for conversational and real-time applications. Designed for low latency, making them a good fit for voice agents, IVR systems, and interactive use cases.
Compliance and security
Execution layer in the EU
Keep your pipeline. Add the execution layer
Continuous cost and latency reduction.
Keep your orchestrator
Livekit, Pipecat, custom. Your application code stays the same.
Keep your LLM
Keep your existing model and provider. SLNG routes, caches, and reduces cost on every call.
Keep your STT & TTS models
Bring your existing contract and provider. Or choose from SLNG 30+ model catalogue.
Getting started
Live instantly. Results within 24hrs
Send your existing call flow. We run it locally in the EU and show you the numbers against your current setup.
1. Add your keys
Bring your own keys for STT, LLM, and TTS. We never see your credentials.
2. Point to SLNG //
Direct your orchestrator to SLNG endpoints for STT, LLM, and TTS.
3. See the results
Give it 24 hours. Your dashboard shows savings, latency, and quality vs. baseline.
Can I bring my own model API keys?
Yes. BYOK is the default. Bring your existing OpenAI, Anthropic, Deepgram, or ElevenLabs keys. The SLNG execution layer routes through them, adding routing, caching, and observability without changing your provider contracts.
Is SLNG suitable for regulated environments?
Yes. SLNG enforces region and country rules at runtime. Enterprise plans add residency, retention, auditability, and SLA-backed guarantees for regulated workloads.
How much does SLNG cost in EU?
US$ 0.0033 per agent minute for the execution layer. Same price as every other region. STT and TTS are each an additional US$ 0.0033 per agent minute if you add them. No contracts. No minimums.
What does the SLNG execution layer run in EU?
LLM routing, smart caching, PII redaction, transcripts, and analytics. All on local compute in Sweden. Audio processed in the EU stays in the EU.
Does my data leave the EU?
No. Routing enforces data residency at the infrastructure level. Audio stays in the EU.
Is SLNG compliant with GDPR?
GDPR compliant. ISO 27001 certified. HIPAA compliant. SOC 2 Type II in audit. Details at trust.slng.ai.
What models run in the EU?
STT: Deepgram Nova 3, Soniox STT AI, Reson8 Resonant 1, Speechmatics Batch. TTS: Rime Arcana, Cartesia Sonic, Murf AI Falcon, Soniox TTS RT, Deepgram Aura 2, Kugel 2. SLNG-hosted on EU compute. Or bring your own keys.
Stay in the loop
Define. Execute. Govern. Verify.
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